{
  "body": "A. Ridnaia, D. Frederiks, A. Lysenko, D. Svinkin,\nA. Tsvetkova,  M. Ulanov, and T. Cline,\non behalf of the Konus-Wind team, report:\n\nThe short-duration GRB 260114A\n(Fermi-GBM detection: Fermi GBM Team, GCN 43395; \nBissaldi, GCN 43400;\nSwift-BAT detection: Eyles-Ferris et al., GCN 43396;\nGECAM-B observation: Ren et al., GCN 43402;\nSVOM/GRM observation: Wang et al., GCN 43404)\ntriggered Konus-Wind at T0=42030.729 s UT (11:40:30.729).\n\nThe burst light curve shows a single pulse\nwhich starts at ~T0 s and has a total duration of ~0.3 s.\nThe emission is seen up to ~2 MeV.\n\nThe Konus-Wind light curve of this GRB is available at\nhttp://www.ioffe.ru/LEA/GRBs/GRB260114_T42030/\n\nAs observed by Konus-Wind, the burst\nhad a fluence of 5.12(-0.25,+0.25)x10^-6 erg/cm2,\nand a 16-ms peak flux, measured from T0+0.024 s,\nof 2.76(-0.33,+0.33)x10^-5 erg/cm2/s\n(both in the 20 keV - 10 MeV energy range).\n\nThe time-averaged spectrum of the burst\n(measured from T0 to T0+0.256 s)\nis best fit in the 20 keV - 10 MeV range\nby a power law with exponential cutoff model:\ndN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep)\nwith  alpha = 0.56(-0.15,+0.16)\nand Ep = 502(-25,+26) keV (chi2 = 36/34 dof).\nFitting by a GRB (Band) model yields the same alpha and Ep,\nand an upper limit on the high energy photon index: beta < -3.4\n(chi2 = 36/33 dof).\n\nAssuming the redshift z=0.524 (Yang et al., GCN 43410)\nand a standard cosmology model with H_0 = 67.3 km/s/Mpc,\nOmega_M = 0.315, and Omega_Lambda = 0.685 (Planck Collaboration, 2014),\nwe estimate the following rest-frame parameters:\nthe isotropic energy release E_iso is 3.86(-0.19,+0.19)x10^51 erg,\nthe peak luminosity L_iso is 3.17(-0.38,+0.38)x10^52 erg/s,\nand the rest-frame peak energy of the time-integrated spectrum,\nEp,i, is 765(-38,+40) keV.\n\nWith the obtained estimates, the position of GRB 260114A in both Eiso-Ep,z and Liso-Ep,z planes \nis consistent with short-hard (Type I) GRB population, \nsee http://www.ioffe.ru/LEA/GRBs/GRB260114_T42030/GRB260114A_rest_frame.pdf\n\nAll the quoted errors are at the 68% confidence level.\nAll the quoted values are preliminary.\n",
  "circularId": 43413,
  "eventId": "GRB 260114A",
  "submittedHow": "web",
  "submitter": "Anna Ridnaia at Ioffe Institute <ridnaia@mail.ioffe.ru>",
  "subject": "Konus-Wind detection of GRB 260114A",
  "format": "text/plain",
  "bibcode": "2026GCN.43413....1R",
  "createdOn": 1768481041319
}